M54HC157D Ver la hoja de datos (PDF) - STMicroelectronics
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M54HC157D Datasheet PDF : 9 Pages
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M54HC157
Figure 1: IEC Logic Symbols
Figure 2: Input And Output Equivalent Circuit
Table 1: Pin Description
Table 2: Truth Table
PIN N°
1
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
15
8
16
SYMBOL
SELECT
1A to 4A
1B to 4B
1Y to 4Y
STROBE
GND
VCC
NAME AND FUNCTION
Common Data Select
Input
Data Inputs From
Source A
Data Inputs From
Source B
Multiplexer Output
Strobe Inputs
Ground (0V)
Positive Supply Voltage
STROBE
H
L
L
L
L
X : Don’t Care
INPUTS
SELECT
A
X
X
L
L
L
H
H
X
H
X
OUTPUTS
B
Y
X
L
X
L
X
H
L
L
H
H
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